RNA and DNA differ
A) in that RNA contains ribose and DNA contains deoxyribose.
B) in that RNA contains nucleosides and DNA contains nucleotides.
C) in that RNA contains uracil and DNA contains thymine.
D) both A and C.
E) All of these are correct.
Answer: D
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Cytosine deamination is a common mutation that results in a cytosine being converted to a uracil. See Figure (a) below. What is the repair mechanism used to restore the correct base?
A. nucleotide excision repair B. mismatch repair C. base excision repair
Mutations are categorized by how the nucleotide sequence is changed. Insertions and deletions are called frameshift mutations. What is the relationship between the location of a frameshift mutation in a gene and its impact on the protein produced?
A) Frameshift mutations near the middle of the gene have the greatest effect on the protein produced. B) Frameshift mutations near the beginning of the gene have the greatest effect on the protein produced. C) Frameshift mutations near the end of the gene have the greatest effect on the protein produced. D) A frameshift mutation at any location affects the protein produced equally
A nutrient medium that has all of its chemical components identified and their precise concentrations known and reproducible would be termed
What will be an ideal response?
Which of the following statements about vesicular membrane fusion is false?
(a) Membrane fusion does not always immediately follow vesicle docking. (b) The hydrophilic surfaces of membranes have water molecules associated with them that must be displaced before vesicle fusion can occur. (c) The GTPhydrolysis of the Rab proteins provides the energy for membrane fusion. (d) The interactions of the v-SNAREs and the t-SNAREs pull the vesicle membrane and the target organelle membrane together so that their lipids can intermix.